Chapter 67: LINQ to XML

Section 67.1: Read XML using LINQ to XML

<?xml version="1.0" encoding="utf-8" ?>

<Employees>

<Employee> <EmpId>1</EmpId> <Name>Sam</Name> <Sex>Male</Sex>

<Phone Type="Home">423-555-0124</Phone> <Phone Type="Work">424-555-0545</Phone>

<Address>

<Street>7A Cox Street</Street> <City>Acampo</City> <State>CA</State> <Zip>95220</Zip> <Country>USA</Country>

</Address>

</Employee>

<Employee> <EmpId>2</EmpId> <Name>Lucy</Name> <Sex>Female</Sex>

<Phone Type="Home">143-555-0763</Phone> <Phone Type="Work">434-555-0567</Phone>

<Address>

<Street>Jess Bay</Street> <City>Alta</City> <State>CA</State> <Zip>95701</Zip> <Country>USA</Country>

</Address>

</Employee>

</Employees>

To read that XML file using LINQ

XDocument xdocument = XDocument.Load("Employees.xml"); IEnumerable<XElement> employees = xdocument.Root.Elements(); foreach (var employee in employees)

{

Console.WriteLine(employee);

}

To access single element

XElement xelement = XElement.Load("Employees.xml"); IEnumerable<XElement> employees = xelement.Root.Elements(); Console.WriteLine("List of all Employee Names :");

foreach (var employee in employees)

{

Console.WriteLine(employee.Element("Name").Value);

}

To access multiple elements

XElement xelement = XElement.Load("Employees.xml");

IEnumerable<XElement> employees = xelement.Root.Elements(); Console.WriteLine("List of all Employee Names along with their ID:"); foreach (var employee in employees)

{

Console.WriteLine("{0} has Employee ID {1}", employee.Element("Name").Value, employee.Element("EmpId").Value);

}

To access all Elements having a specific attribute

XElement xelement = XElement.Load("Employees.xml");

var name = from nm in xelement.Root.Elements("Employee") where (string)nm.Element("Sex") == "Female" select nm;

Console.WriteLine("Details of Female Employees:"); foreach (XElement xEle in name) Console.WriteLine(xEle);

To access specific element having a specific attribute

XElement xelement = XElement.Load("..\\..\\Employees.xml");

var homePhone = from phoneno in xelement.Root.Elements("Employee")

where (string)phoneno.Element("Phone").Attribute("Type") == "Home" select phoneno;

Console.WriteLine("List HomePhone Nos."); foreach (XElement xEle in homePhone)

{

Console.WriteLine(xEle.Element("Phone").Value);

}